You are straight tripping. I use my 6 pro constantly, my fiance has 7 pro and is basically on social media 12 hours a day... We have never had to charge it in less than 20 hours from when battery full.
Like, the only use case that would probably draw more battery is someone who does very heavy gaming on the phone (I play an hour or so most days myself). I just cant see a scenario where you get only 8 hours of battery life tbh. I'm going to have to call BS on this article. I'm not saying s23 ultra wouldn't be better battery but I feel like you just trolling about pixel.